Electric Cutting Blade Control With Object Position Detection
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Solution Overview
Problem
Existing electric cutting devices start cutting operations even when the object to be cut is not appropriately positioned between the cutting blades, leading to potential damage or inefficiency.
Innovation Solution
Incorporating a detector that ensures the cutting blades only operate when both an operation device and a positional detection system confirm the object is correctly positioned, preventing inappropriate cutting initiation and user-induced operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the trigger switch is provided as the only control mechanism, then the ease of operation is improved, but the reliability deteriorates because cutting may start when the object is not properly positioned
Solution Approach 1:
The detector provides feedback about the object's positioning status to the control unit. The control unit receives signals from both the trigger switch and the detector, and only activates the cutting blades when both conditions are satisfied: the trigger is pressed AND the object is properly positioned. This feedback mechanism ensures reliable operation while maintaining ease of use.
Solution Approach 2:
The control unit acts as an intermediary between the trigger switch and the cutting blades. It processes signals from both the trigger switch and the detector, and only transmits the activation signal to the cutting blades when both conditions are met. This intermediary function prevents inappropriate cutting operations while preserving simple user interaction.
2Reliability
If the detector is added to detect object positioning, then the reliability is improved, but the device complexity increases
Solution Approach 1:
The detection function is extracted as a separate detector component from the main cutting mechanism. This modular approach allows the detector to be added independently to provide positioning verification without fundamentally redesigning the entire cutting device. The control unit integrates signals from this separate detector with the trigger switch signal.
Solution Approach 2:
The control unit performs multiple functions: it processes the trigger switch signal, receives and processes the detector signal, and controls the cutting blade activation. By making the control unit multi-functional, the patent avoids adding separate control circuits for each function, thereby minimizing the increase in device complexity while achieving reliable positioning-dependent control.
3Reliability
If the cutting blades are activated only when both operation device and detector are ON, then the reliability is improved, but the productivity may deteriorate due to additional positioning requirements
Solution Approach 1:
The detector continuously monitors the object's positioning status before cutting activation is requested. By having the positioning verification ready in advance and continuously available, the system eliminates the need for manual positioning checks or adjustments during the cutting process, thereby maintaining high productivity while ensuring reliable operation.
Data Source
AI summary
An electric cutting device includes: a pair of cutting blades configured to clamp and cut an object; an electric motor configured to generate a driving force necessary for operating the cutting blades; a controller configured to control an operation of the electric motor; an operation device configured to be switched between an ON state and an OFF state by a user operation; and a detector configured to: enter into an ON state in a case where the object is present between the pair of cutting blades; and enter into an OFF state in a case where the object is not present. The controller is configured to execute an operation of closing the pair of cutting blades in a case where both the operation device and the detector are in the ON state.